Feel like I am missing a step somewhere.
I clone the flarum/flarum.
Change all the dependencies to dev-master in the composer.json
Do composer update --prefer-source
Then when I try to do to the localhost/flarumd/public folder I get an error (flarumd is where I cloned flarum/flarum)
Fatal error: Uncaught Flarum\Http\Exception\RouteNotFoundException in C:\xampp\htdocs\flarumd\vendor\flarum\core\src\Http\Middleware\DispatchRoute.php:62 Stack trace: #0 C:\xampp\htdocs\flarumd\vendor\zendframework\zend-stratigility\src\Dispatch.php(212): Flarum\Http\Middleware\DispatchRoute->__invoke(Object(Zend\Stratigility\Http\Request), Object(Zend\Stratigility\Http\Response), Object(Zend\Stratigility\Next)) #1 C:\xampp\htdocs\flarumd\vendor\zendframework\zend-stratigility\src\Dispatch.php(88): Zend\Stratigility\Dispatch->dispatchCallableMiddleware(Object(Flarum\Http\Middleware\DispatchRoute), Object(Zend\Stratigility\Next), Object(Zend\Stratigility\Http\Request), Object(Zend\Stratigility\Http\Response), NULL) #2 C:\xampp\htdocs\flarumd\vendor\zendframework\zend-stratigility\src\Next.php(160): Zend\Stratigility\Dispatch->__invoke(Object(Zend\Stratigility\Route), NULL, Object(Zend\Stratigility\Http\Request), Object(Zend\Stratigility\Http\Response), Object(Zend\Stratigility\Next)) #3 C:\xampp\htdocs\flarumd\vendor\flaru in C:\xampp\htdocs\flarumd\vendor\flarum\core\src\Http\Middleware\DispatchRoute.php on line 62